Arup or ARUP may refer to:

• Arup (name), an Indian male given name, meaning "formless" in Sanskrit
• Arupajhana, formless meditation in Buddhism
• Arup Group, a multinational professional services firm
• Arup Manufacturing Corporation, an aircraft manufacturer
• ARUP Laboratories, a national reference laboratory at the University of Utah
• Angle-resolved photoemission spectroscopy
• Arup Kotha, also known as Bedeni, an unfinished Bengali film directed by Ritwik Ghatak

• Rupa (disambiguation)
• Aarup or Årup, the name of several localities in Denmark and Sweden